Door lock



March l2, 1940. w R, SCHLAGE 2,193,349

DooR Loox Filed June 18, 1937 2 Smets-Sheet 1 ha ig/BMM ATTORNEY.

March 12, 1940. w R, SCHLAGE 2,193,349

DOOR LOCK Filed June 18, 1957 2 skins-sneer 2 INV N TOR.

Nafta/7E A TTORNYI Patented Mar. 12, 1940 UNITED STATES PATENT OFFICEDOOR LOCK Application June 18, 1937, Serial No. 148,935

8 Claims.

This invention relates to a door lock employing an inner and an outerknob, together with means for clogging or rendering inoperative theouter knob, and especially to means for visibly indicat` ing whether ornot the outer knob has been rendered inoperative. The presentapplication presents a. modiiication of my former Patent No. 1,944,469,entitled Door lock indicator, issued January 23, 1934.

The object of the present invention is to generally improve and simplifythe construction and operation of door locks of the character described,to provide a lock having an inner and an outer knob whereby the latchbolt may be retracted, to provide a dogging mechanism whereby the outerknob may be dogged against rotation, to provide push-button-actuatedmeans in the inner knob for actuating the dogging mechanism and forsimultaneously projecting an indicator through the outer knob to visiblyindicate that the knob has been rendered inoperative; to provide aninner and an outer spindle whereby the knobs are carried, said innerspindle extending into the outer knob, to provide a key opening 'in theouter knob to permit the insertion of an emergency key; to provide astructure which permits the key to connect with and rotate the` cured toone end, and its outer end sldably` mounted in the outer knob, andadapted to be projected a suiicient distance to function as a visibleindicator.

The invention is shown by way of illustration in the accompanyingdrawings, in which Fig. 1 is a horizontal section of the lock, showingit mounted in a door;

Fig. 2 is a vertical section taken on line II-II of Fig. 1;

Figs. 3 and 4 are perspective views of the rollback portions of therespective spindles; Fig. 5 is a longitudinal section showing thespindles telescoped;

Fig. 6 is a perspective view of the retractor plate and the latch bolt;

Fig. 7 is a perspective view of the dog, together with the flogging lugscarried thereby;

Fig. 8 is a perspective view of the lock housing; Fig. 9 is aperspective view of the retractor plate and the spindles extendingtherethrough, said View showing the manner in which the dogging lugsengage and dog the outer spindle;

(ci. vri-147) Fig. 10 is a perspective view of the bar, showing the pushbutton at one end and the guide cap at the opposite end;

Fig. 11 is a perspective view of the cap;

Fig. 12 is a perspective view of the emergency '5 key.

Referring to the drawings in detail, and particularly to Figs. 1 to '7,inclusive, A and B indicate the opposite faces of the stile of a hollowmetal door, and C the front edge thereof. Form- 10 ed in the faces A andB are openings which are provided for the reception of spindle bearings,as will hereinafter appear; and formed in the front edge C is an openingthrough which the lock housing generally indicated at D in Fig. 8 16 isadapted to be inserted.

The housing shown in Fig. 8 is rectangular in shape and consists of topand bottom plates 5 and 6 which are connected by front and rear endplates 1 and 8 and side plates 9 and I0 in 20 which are formedscrew-threaded openings.

The housing is inserted in the door through the opening formed in thefront edge C, and when inserted is secured by a pair of spindle bearingsII and I2 which are inserted through the open- 25 ings formed in theopposite faces A and B of the stile. The spindle bearings are providedwith threaded inner ends IIa and I2a which are screwed into the threadedopenings formed in the side plates 9 and I0 of the housing and thus 30secure and support the rear end of the housing with relation toKthe sidewall, while the front end will be secured and supported in the openingthrough which it is inserted.

`Slidably mounted for longitudinal movement 35 within the housing is aretractor plate I3. This plate is guided at the inner end by lugs I4 ex`tending into slots lli-I5 formed in the top and bottom plates 5 and 6,while the front end is guided by a latch bolt I6 which is secured to the40 retractor plate and normally extends through an opening 'Ia formed inthe front plate.

On the rear end of the retractor plate is a cross-bar I1 and formed inthe front thereof is an opening I8 through which extend a pair of tele-45 scoping spindles I9 and 2|] which are supported and journaled in thespindle bearings Il and I2. Each spindle is provided with a transverseslot to form roll-back sections 2l and 22 which engage the front face ofthe cross-bar I'I and impart 50 reciprocal movement thereto when eitherspindle is rotated, and, as the cross-bar is secured to or forms a partof the retractor plate, said plate together with the latch bolt willalso be reciprocated. 55

Formed in the front face of the cross bar I1 is a recess 23, and formedrearwardly thereof and extending through the cross bar is a passage inwhich is mounted a dogging member 24, said dogging member being providedwith a pair of dogging lugs 28 and also with a pin 28 which serves as asupport and guide for a spring 21 interposed between the dog 24 and therear plate 8 of the housing. The cross bar I1 is provided with a pair ofpins 28 which serve as supports and guides for a pair of springs 29which are interposed between the cross plate and the rear plate 8 of thehousing. The springs 23 normally function to maintain the retractor, thecross bar, and the latch bolt, in the extended position shown in Fig. 2,but they yield when either spindle is rotated so as to to permitretraction of the latch bolt when the door is to be opened. The spring21 also aids the springs 29 in their function, but in addition theretoactuates the dogging member 24, that is, it tends to maintain theclogging member within the passage formed in the cross bar for itsreception, the inward movement of the dogging member in this passagebeing limited by the dogglng lugs 25. which enter recesses 25a formed inthe rear face of the cross bar |1.

Extending through the spindles is a. bar 30. Secured on the inner end ofthe bar is a push button 3|. Secured within the spindle I5 is a washer32 which is slotted to permit the vbar 30 to pass therethrough, andinterposed between the washer and the pushbutton is a spring 33 whichnormally serves to maintain the push button in the extended positionshown in Fig. 1, the distance to which the push button is' extendedbeing limited by a pin 34 secured in the bar and engaging the washer 32.

In the outer end of the spindle is mounted a cap 36, in the outer end ofwhich is formed a slot 31 which forms a guide'and a support for theout-er end of the bar 30, and which also functions as a keyway for anemergency key hereinafter to be described. The cap is suitably securedto the outer end of the spindle I9.

The lock structure here disclosed is particularly intended for use as aninside lock, that is, to permit a person to temporarily lock the doorfrom the inside while the room is being occupied, for

instance, bathrooms, toilets and the like. No key mechanism is employed,as the locking operation is performed by the dogging mechanism shown inFig. 7. In order to describe more clearly the operation of the lock, letit be assumed that it is installed in a door as illustrated in Fig. 1and that a person has just entered a room and desires to lock the doorfrom the inside. In that case, he or she will merely push the button 3|inwardly. In doing so, a notch 30a formed in the bar wil be moved intoalignment with the dog 24. This will immediately move inwardly adistance equal to the depth ofv the notch 30a, due to the pressure ofthe spring 21, and the dog 24 will thus dog the bar 30 against thetension of the spring 33, which normally tends to maintain the bar andbutton in the full-line position shown in Fig. 1. In addition toclogging the bar against movement, the lugs will at the same time enterthe slots 20h (see Figs. 1, 4 and-9 formed in the outer spindle, and

thus will dog the outer spindle and the knobv against rotation. Inaddition to the two operations just described, a visible indicator willbe displayed, as the outer end of the bar will project through theslotted cap 36 to assume the position shown in dotted lines at 3l (seeFig. 1), thus indicating that the room is occupied and that the outerknob has been rendered inoperative. Ii' the person desires 4to leave theroom, he or she will merely rotate the inner knob. In doing so, theroll-back portion 2| ot the inner spindle will engage the front faceV otthe cross-bar |1 and force it, together with the retractor plate andlatch bolt I8 rearwardly ln the housing. During this rearward movement,the dog 24 and the lugs 25 carried thereby are also moved rearwardly andthe outer spindle, together with the bar 30, is undogged and released,the bar being instantaneously restored to the normal position shown inthe full line in Fig. 1, by the spring 33; thus the door is summaticallyunlocked or undogged by a mere rotation of the inner knob and spindle.

The indicator will also be retracted, and the outer spindle undogged orreleased, upon depression of the latch bolt, as such depression causesinward movement of the retractor and the dog carried thereby,A that is,when such inward movement takes place, the lugs 25 release the outerspindle, and at the same time the bar is released.

If a person has entered a room and locked or dogged the door from theinside, and an emergency should occur, that is, should the person faintin the room, or something of that sort, it is possible to open the doorfrom the exterior by the use of an emergency key such as shown in Fig.A12. This key has a longitudinally extending slot 40 formed in its innerend, which is adapted to straddle the reduced projecting end 38 of thebar 30. That is, if the door has been dogged fromv the inside, the end38 of the bar will project through the cap 36, and thus indicate thatthe door is dogged, but if the key, such as shown in Fig. 12, isinserted, it will straddle the projecting end of the bar and may thus beinserted in the slot 31, and when so inserted it is only necessary torotate the key as such rotation will rotate the cap and the innerspindle to which it is secured, and when such rotation takes place, theroll-back 2| of the inner spindle will actuate the retractor and releasethe dogs 24 and 25, thus permitting the bar to be restored to normalposition, and at the same time releasing the outer spindle.

It is not essential that the outer end of the bar 30 be reduced inwidth; in fact, it might have a width equal to the slot 31, and in thatcase, when it assumed the projecting position, the projecting end wouldform a turn-piece whereby the inner spindle could be rotated to open thedoor from the outside, but the provision of such a turn-piece would makeit possible for anyone to open the door from the outside. It is for thisreason that it is desirable to reduce the width of the bar 30 so thatthe use of an emergency key will be necessary, as the door should not beopened from the outside except under emergency conditions.

While this and other features of the invention have been more or lessspeciically described and illustrated, I nevertheless wish it understoodthat changes may be resorted to within the scope of the appended claims,and that the material and nish of the several parts employed may be suchas the experience and judgment of the manufacturer may dictate.

I claim:

1. In a door lock, an inner and an outer spindle, a knob on eachspindle, said inner spindle extending into the outer knob, and saidspindle having a key-receiving opening formed therein for the receptionof a key, means whereby the inner spindle is rotated by said key; aspringactuated dog for dogging the outer spindle and knob againstoperation; a bar extending through the spindles, said bar normallyengaging the dog and holding the dog out of dogging position; means inthe inner knob for imparting longitudinal movement to the bar to projectthe opposite end of the bar through and beyond the outer knob tofunction as an indicator, said bar simultaneously releasing the cloggingmember to permit it to dog the outer spindle and knob against operation,and said dog simultaneously clogging the bar in its indicating position;means actuated by rotation of the inner spindle either by the inner knobor by the key for undogging the bar and the outer spindle and knob; andmeans for returning the bar to normal position when released by the dog.

2. In a door lock, an inner and an outer spindle, a latch bolt actuatedthereby, a bar extending through both spindles, a push button in theinner spindle, and connected with the bar, said push button whendepressed imparting longitudinal movement to the bar toproject theopposite end of the bar beyond the outer spindle, to function as anindicator, a spring-pressed dog engageable with the bar andautomatically entering a notch formed in the bar to dog the bar when thebutton is depressed, and means whereby said dog simultaneously dogs theouter spindle against rotation.

3. In a door lock, an inner and an outer knob, a latch bolt actuatedthereby, a bar extending through both knobs, a push button in the innerknob, and connected with the bar, said push button when depressedimparting longitudinal movement to the bar to project the opposite endof the bar beyond the outer knob, to function as an indicator, aspring-pressed dog engageable with the bar and automatically entering anotch formed in the bar to dog the bar when the button is depressed,means whereby said dog simultaneously dogs the outer spindle againstrotation, and means actuated by depression oi the latch bolt forsimultaneously undogging the outer knob and the bar.

4. In a door lock, an inner and an outer rotatable knob, a latch boltactuated thereby, a bar extending through both knobs, a push button inthe inner knob, and connected with the bar, said push button whendepressed imparting longitudinal movement to the bar to project theopposite end o! the bar beyond the outer knob, to function as anindicator; a dog engageable with the bar and automatically entering anotch formed in the bar to dog the bar when the button is depressed,means whereby said dog simultaneously dogs the outer knob ed to beprojected through and beyond the outer knob, means for retaining theindicator in its projected position, and means for automaticallyretracting the indicator upon rotation of the inner spindle by means of-the key.

6. In a door lock, an inner and an outer spindle, a latch bolt actuatedthereby, a bar extending through both spindles, a push buttonin theinner spindle and connected with the bar, said push button whendepressed imparting longitudinal movement to the bar to project theopposite end of the bar beyond the outer spindle to function as anindicator, said bar having a notch formed therein and said outer spindlehaving a notch formed therein, and a spring-actuated dog engageable withsaid notches when the button is depressed and clogging said membersagainst operation.

7. In a door lock, an inner and an outer spindle, a latch bolt actuatedthereby, a bar extending through both spindles, a push button in theinner spindle and connected with the bar, said push button whendepressed imparting longitudinal movement to the bar to project theopposite end of the bar beyond the outer spindle to function as anindicator, said bar havlng a notch formed therein and said outer spindlehaving a notch formed therein, a springactuated dog engageablewith saidnotches when the button is depressed and dogging said members againstoperation, a'spring normally tending to retract the push button whendepressed, and means actuated by depression of the latch bolt forwithdrawing the dog from the notches in the bar and spindle to undogsaid spindle and to permit the spring to retract the push button.

8. In a door lock, an inner and an outer spindle, a knob on eachspindle, said outer knob having a key-receiving opening formed thereinfor the reception of a key, means whereby the inner spindle is rotatedby said key, a latch bolt actuated by either spindle, an indicatorwithin the spindles adapted to be projected through and beyond the outerlmob, means for retaining the indicator in its projected position, andmeans for automatically retracting the indicator upon rotation o f theinner spindle by means ot the key or upon depression oi' the latch bolt;

WALTER R. SCHLAGE.

